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pico-hsm/src/hsm/sc_hsm.c
Pol Henarejos 629f14ab0d
Revert "Move EDDSA to another branch." 
This reverts commit a0faf5308e.
2025-12-11 19:35:27 +01:00

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/*
* This file is part of the Pico HSM distribution (https://github.com/polhenarejos/pico-hsm).
* Copyright (c) 2022 Pol Henarejos.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "sc_hsm.h"
#include "files.h"
#include "version.h"
#include "crypto_utils.h"
#include "kek.h"
#include "eac.h"
#include "cvc.h"
#include "asn1.h"
#include "pico_keys.h"
#include "usb.h"
#include "random.h"
#include "version.h"
const uint8_t sc_hsm_aid[] = {
11,
0xE8, 0x2B, 0x06, 0x01, 0x04, 0x01, 0x81, 0xC3, 0x1F, 0x02, 0x01
};
const uint8_t atr_sc_hsm[] = {
24,
0x3B, 0xFE, 0x18, 0x00, 0x00, 0x81, 0x31, 0xFE, 0x45, 0x80, 0x31, 0x81, 0x54, 0x48, 0x53, 0x4D,
0x31, 0x73, 0x80, 0x21, 0x40, 0x81, 0x07, 0xFA
};
uint8_t session_pin[32], session_sopin[32];
bool has_session_pin = false, has_session_sopin = false;
const uint8_t *dev_name = NULL;
uint16_t dev_name_len = 0;
uint8_t PICO_PRODUCT = 1;
uint8_t PICO_VERSION_MAJOR = HSM_VERSION_MAJOR;
uint8_t PICO_VERSION_MINOR = HSM_VERSION_MINOR;
static int sc_hsm_process_apdu();
static void init_sc_hsm();
static int sc_hsm_unload();
extern int cmd_select();
extern void select_file(file_t *pe);
extern int cmd_list_keys();
extern int cmd_read_binary();
extern int cmd_verify();
extern int cmd_reset_retry();
extern int cmd_challenge();
extern int cmd_external_authenticate();
extern int cmd_mse();
extern int cmd_initialize();
extern int cmd_key_domain();
extern int cmd_key_wrap();
extern int cmd_keypair_gen();
extern int cmd_update_ef();
extern int cmd_delete_file();
extern int cmd_change_pin();
extern int cmd_key_gen();
extern int cmd_signature();
extern int cmd_key_unwrap();
extern int cmd_decrypt_asym();
extern int cmd_cipher_sym();
extern int cmd_derive_asym();
extern int cmd_extras();
extern int cmd_general_authenticate();
extern int cmd_session_pin();
extern int cmd_puk_auth();
extern int cmd_pso();
extern int cmd_bip_slip();
extern const uint8_t *ccid_atr;
int sc_hsm_select_aid(app_t *a, uint8_t force) {
(void) force;
a->process_apdu = sc_hsm_process_apdu;
a->unload = sc_hsm_unload;
init_sc_hsm();
return PICOKEY_OK;
}
INITIALIZER( sc_hsm_ctor ) {
printf("INITIALIZER\n");
ccid_atr = atr_sc_hsm;
register_app(sc_hsm_select_aid, sc_hsm_aid);
}
void scan_files() {
file_pin1 = search_file(EF_PIN1);
if (file_pin1) {
if (!file_pin1->data) {
printf("PIN1 is empty. Initializing with default password\n");
const uint8_t empty[33] = { 0 };
file_put_data(file_pin1, empty, sizeof(empty));
}
}
else {
printf("FATAL ERROR: PIN1 not found in memory!\n");
}
file_sopin = search_file(EF_SOPIN);
if (file_sopin) {
if (!file_sopin->data) {
printf("SOPIN is empty. Initializing with default password\n");
const uint8_t empty[33] = { 0 };
file_put_data(file_sopin, empty, sizeof(empty));
}
}
else {
printf("FATAL ERROR: SOPIN not found in memory!\n");
}
file_retries_pin1 = search_file(EF_PIN1_RETRIES);
if (file_retries_pin1) {
if (!file_retries_pin1->data) {
printf("Retries PIN1 is empty. Initializing with default retriesr\n");
const uint8_t retries = 3;
file_put_data(file_retries_pin1, &retries, sizeof(uint8_t));
}
}
else {
printf("FATAL ERROR: Retries PIN1 not found in memory!\n");
}
file_retries_sopin = search_file(EF_SOPIN_RETRIES);
if (file_retries_sopin) {
if (!file_retries_sopin->data) {
printf("Retries SOPIN is empty. Initializing with default retries\n");
const uint8_t retries = 15;
file_put_data(file_retries_sopin, &retries, sizeof(uint8_t));
}
}
else {
printf("FATAL ERROR: Retries SOPIN not found in memory!\n");
}
file_t *tf = NULL;
tf = search_file(EF_PIN1_MAX_RETRIES);
if (tf) {
if (!tf->data) {
printf("Max retries PIN1 is empty. Initializing with default max retriesr\n");
const uint8_t retries = 3;
file_put_data(tf, &retries, sizeof(uint8_t));
}
}
else {
printf("FATAL ERROR: Max Retries PIN1 not found in memory!\n");
}
tf = search_file(EF_SOPIN_MAX_RETRIES);
if (tf) {
if (!tf->data) {
printf("Max Retries SOPIN is empty. Initializing with default max retries\n");
const uint8_t retries = 15;
file_put_data(tf, &retries, sizeof(uint8_t));
}
}
else {
printf("FATAL ERROR: Retries SOPIN not found in memory!\n");
}
low_flash_available();
}
void scan_all() {
scan_flash();
scan_files();
}
PUK puk_store[MAX_PUK_STORE_ENTRIES];
int puk_store_entries = 0;
PUK *current_puk = NULL;
uint8_t puk_status[MAX_PUK];
int add_cert_puk_store(const uint8_t *data, uint16_t data_len, bool copy) {
if (data == NULL || data_len == 0) {
return PICOKEY_ERR_NULL_PARAM;
}
if (puk_store_entries == MAX_PUK_STORE_ENTRIES) {
return PICOKEY_ERR_MEMORY_FATAL;
}
puk_store[puk_store_entries].copied = copy;
if (copy == true) {
uint8_t *tmp = (uint8_t *) calloc(data_len, sizeof(uint8_t));
memcpy(tmp, data, data_len);
puk_store[puk_store_entries].cvcert = tmp;
}
else {
puk_store[puk_store_entries].cvcert = data;
}
puk_store[puk_store_entries].cvcert_len = data_len;
puk_store[puk_store_entries].chr = cvc_get_chr(puk_store[puk_store_entries].cvcert,
data_len,
&puk_store[puk_store_entries].chr_len);
puk_store[puk_store_entries].car = cvc_get_car(puk_store[puk_store_entries].cvcert,
data_len,
&puk_store[puk_store_entries].car_len);
puk_store[puk_store_entries].puk = cvc_get_pub(puk_store[puk_store_entries].cvcert,
data_len,
&puk_store[puk_store_entries].puk_len);
puk_store_entries++;
return PICOKEY_OK;
}
int puk_store_select_chr(const uint8_t *chr) {
for (int i = 0; i < puk_store_entries; i++) {
if (memcmp(puk_store[i].chr, chr, puk_store[i].chr_len) == 0) {
current_puk = &puk_store[i];
return PICOKEY_OK;
}
}
return PICOKEY_ERR_FILE_NOT_FOUND;
}
void reset_puk_store() {
if (puk_store_entries > 0) { /* From previous session */
for (int i = 0; i < puk_store_entries; i++) {
if (puk_store[i].copied == true) {
free((uint8_t *) puk_store[i].cvcert);
}
}
}
memset(puk_store, 0, sizeof(puk_store));
puk_store_entries = 0;
file_t *fterm = search_file(EF_TERMCA);
if (fterm) {
uint8_t *p = NULL, *fterm_data = file_get_data(fterm), *pq = fterm_data;
uint16_t fterm_data_len = file_get_size(fterm);
asn1_ctx_t ctxi;
asn1_ctx_init(fterm_data, fterm_data_len, &ctxi);
while (walk_tlv(&ctxi, &p, NULL, NULL, NULL)) {
add_cert_puk_store(pq, (uint16_t)(p - pq), false);
pq = p;
}
}
for (int i = 0; i < 0xfe; i++) {
file_t *ef = search_file((CA_CERTIFICATE_PREFIX << 8) | (uint8_t)i);
if (ef && file_get_size(ef) > 0) {
add_cert_puk_store(file_get_data(ef), file_get_size(ef), false);
}
}
dev_name = cvc_get_chr(file_get_data(fterm), file_get_size(fterm), &dev_name_len);
memset(puk_status, 0, sizeof(puk_status));
}
void init_sc_hsm() {
scan_all();
has_session_pin = has_session_sopin = false;
isUserAuthenticated = false;
cmd_select();
reset_puk_store();
}
int sc_hsm_unload() {
has_session_pin = has_session_sopin = false;
isUserAuthenticated = false;
sm_session_pin_len = 0;
return PICOKEY_OK;
}
uint16_t get_device_options() {
file_t *ef = search_file(EF_DEVOPS);
if (file_has_data(ef)) {
return get_uint16_t_be(file_get_data(ef));
}
return 0x0;
}
bool wait_button_pressed() {
uint32_t val = EV_PRESS_BUTTON;
#ifndef ENABLE_EMULATION
uint16_t opts = get_device_options();
if (opts & HSM_OPT_BOOTSEL_BUTTON) {
queue_try_add(&card_to_usb_q, &val);
do{
queue_remove_blocking(&usb_to_card_q, &val);
} while (val != EV_BUTTON_PRESSED && val != EV_BUTTON_TIMEOUT);
}
#endif
return val == EV_BUTTON_TIMEOUT;
}
int parse_token_info(const file_t *f, int mode) {
(void)f;
#ifdef __FOR_CI
char *label = "SmartCard-HSM";
#else
char *label = "Pico-HSM";
#endif
char *manu = "Pol Henarejos";
if (mode == 1) {
uint8_t *p = res_APDU;
*p++ = 0x30;
*p++ = 0; //set later
*p++ = 0x2; *p++ = 1; *p++ = HSM_VERSION_MAJOR;
#ifndef ENABLE_EMULATION
*p++ = 0x4; *p++ = 8; memcpy(p, pico_serial.id, 8); p += 8;
#else
*p++ = 0x4; *p++ = 8; memset(p, 0, 8); p += 8;
#endif
*p++ = 0xC; *p++ = (uint8_t)strlen(manu); strcpy((char *) p, manu); p += strlen(manu);
*p++ = 0x80; *p++ = (uint8_t)strlen(label); strcpy((char *) p, label); p += strlen(label);
*p++ = 0x3; *p++ = 2; *p++ = 4; *p++ = 0x30;
res_APDU_size = (uint16_t)(p - res_APDU);
res_APDU[1] = (uint8_t)res_APDU_size - 2;
}
return (int)(2 + (2 + 1) + (2 + 8) + (2 + strlen(manu)) + (2 + strlen(label)) + (2 + 2));
}
int parse_ef_dir(const file_t *f, int mode) {
(void)f;
#ifdef __FOR_CI
char *label = "SmartCard-HSM";
#else
char *label = "Pico-HSM";
#endif
if (mode == 1) {
uint8_t *p = res_APDU;
*p++ = 0x61;
*p++ = 0; //set later
*p++ = 0x4F; *p++ = sc_hsm_aid[0]; memcpy(p, sc_hsm_aid + 1, sc_hsm_aid[0]); p += sc_hsm_aid[0];
*p++ = 0x50; *p++ = (uint8_t)strlen(label); strcpy((char *) p, label); p += strlen(label);
res_APDU_size = (uint16_t)(p - res_APDU);
res_APDU[1] = (uint8_t)res_APDU_size - 2;
}
return (int)(2 + (2 + sc_hsm_aid[0]) + (2 + strlen(label)));
}
int pin_reset_retries(const file_t *pin, bool force) {
if (!pin) {
return PICOKEY_ERR_NULL_PARAM;
}
const file_t *max = search_file(pin->fid + 1);
const file_t *act = search_file(pin->fid + 2);
if (!max || !act) {
return PICOKEY_ERR_FILE_NOT_FOUND;
}
uint8_t retries = file_read_uint8(act);
if (retries == 0 && force == false) { // blocked
return PICOKEY_ERR_BLOCKED;
}
retries = file_read_uint8(max);
int r = file_put_data((file_t *) act, &retries, sizeof(retries));
low_flash_available();
return r;
}
int pin_wrong_retry(const file_t *pin) {
if (!pin) {
return PICOKEY_ERR_NULL_PARAM;
}
const file_t *act = search_file(pin->fid + 2);
if (!act) {
return PICOKEY_ERR_FILE_NOT_FOUND;
}
uint8_t retries = file_read_uint8(act);
if (retries > 0) {
retries -= 1;
int r = file_put_data((file_t *) act, &retries, sizeof(retries));
if (r != PICOKEY_OK) {
return r;
}
low_flash_available();
if (retries == 0) {
return PICOKEY_ERR_BLOCKED;
}
return retries;
}
return PICOKEY_ERR_BLOCKED;
}
bool pka_enabled() {
file_t *ef_puk = search_file(EF_PUKAUT);
return file_has_data(ef_puk) && file_read_uint8(ef_puk) > 0;
}
uint16_t check_pin(const file_t *pin, const uint8_t *data, uint16_t len) {
if (!file_has_data((file_t *) pin)) {
return SW_REFERENCE_NOT_FOUND();
}
if (pka_enabled() == false) {
isUserAuthenticated = false;
}
has_session_pin = has_session_sopin = false;
if (is_secured_apdu() && sm_session_pin_len > 0 && pin == file_pin1) {
if (len == sm_session_pin_len && memcmp(data, sm_session_pin, len) != 0) {
int retries;
if ((retries = pin_wrong_retry(pin)) < PICOKEY_OK) {
return SW_PIN_BLOCKED();
}
return set_res_sw(0x63, 0xc0 | (uint8_t)retries);
}
}
else {
uint8_t dhash[32];
double_hash_pin(data, len, dhash);
if (sizeof(dhash) != file_get_size(pin) - 1) { // 1 byte for pin len
return SW_CONDITIONS_NOT_SATISFIED();
}
if (memcmp(file_get_data(pin) + 1, dhash, sizeof(dhash)) != 0) {
int retries;
if ((retries = pin_wrong_retry(pin)) < PICOKEY_OK) {
return SW_PIN_BLOCKED();
}
return set_res_sw(0x63, 0xc0 | (uint8_t)retries);
}
}
int r = pin_reset_retries(pin, false);
if (r == PICOKEY_ERR_BLOCKED) {
return SW_PIN_BLOCKED();
}
if (r != PICOKEY_OK) {
return SW_MEMORY_FAILURE();
}
if (pka_enabled() == false) {
isUserAuthenticated = true;
}
if (pin == file_pin1) {
hash_multi(data, len, session_pin);
has_session_pin = true;
}
else if (pin == file_sopin) {
hash_multi(data, len, session_sopin);
has_session_sopin = true;
}
if (pending_save_dkek != 0xff) {
save_dkek_key(pending_save_dkek, NULL);
pending_save_dkek = 0xff;
}
return SW_OK();
}
const uint8_t *get_meta_tag(file_t *ef, uint16_t meta_tag, uint16_t *tag_len) {
if (ef == NULL) {
return NULL;
}
uint8_t *meta_data = NULL;
uint16_t meta_size = meta_find(ef->fid, &meta_data);
if (meta_size > 0 && meta_data != NULL) {
uint16_t tag = 0x0;
uint8_t *tag_data = NULL, *p = NULL;
asn1_ctx_t ctxi;
asn1_ctx_init(meta_data, meta_size, &ctxi);
while (walk_tlv(&ctxi, &p, &tag, tag_len, &tag_data)) {
if (tag == meta_tag) {
return tag_data;
}
}
}
return NULL;
}
uint32_t get_key_counter(file_t *fkey) {
uint16_t tag_len = 0;
const uint8_t *meta_tag = get_meta_tag(fkey, 0x90, &tag_len);
if (meta_tag) {
return get_uint32_t_be(meta_tag);
}
return 0xffffffff;
}
bool key_has_purpose(file_t *ef, uint8_t purpose) {
uint16_t tag_len = 0;
const uint8_t *meta_tag = get_meta_tag(ef, 0x91, &tag_len);
if (meta_tag) {
for (unsigned i = 0; i < tag_len; i++) {
if (meta_tag[i] == purpose) {
return true;
}
}
return false;
}
return true;
}
uint32_t decrement_key_counter(file_t *fkey) {
if (!fkey) {
return 0xffffff;
}
uint8_t *meta_data = NULL;
uint16_t meta_size = meta_find(fkey->fid, &meta_data);
if (meta_size > 0 && meta_data != NULL) {
uint16_t tag = 0x0;
uint8_t *tag_data = NULL, *p = NULL;
uint16_t tag_len = 0;
uint8_t *cmeta = (uint8_t *) calloc(1, meta_size);
/* We cannot modify meta_data, as it comes from flash memory. It must be cpied to an aux buffer */
memcpy(cmeta, meta_data, meta_size);
asn1_ctx_t ctxi;
asn1_ctx_init(meta_data, meta_size, &ctxi);
while (walk_tlv(&ctxi, &p, &tag, &tag_len, &tag_data)) {
if (tag == 0x90) { // ofset tag
uint32_t val = get_uint32_t_be(tag_data);
val--;
put_uint32_t_be(val, tag_data);
int r = meta_add(fkey->fid, cmeta, (uint16_t)meta_size);
free(cmeta);
if (r != 0) {
return 0xffffffff;
}
low_flash_available();
return val;
}
}
free(cmeta);
}
return 0xffffffff;
}
// Stores the private and public keys in flash
int store_keys(void *key_ctx, int type, uint8_t key_id) {
int r = 0;
uint16_t key_size = 0;
uint8_t kdata[4096 / 8]; // worst case
if (type & PICO_KEYS_KEY_RSA) {
mbedtls_rsa_context *rsa = (mbedtls_rsa_context *) key_ctx;
key_size = (uint16_t)mbedtls_mpi_size(&rsa->P) + (uint16_t)mbedtls_mpi_size(&rsa->Q);
mbedtls_mpi_write_binary(&rsa->P, kdata, key_size / 2);
mbedtls_mpi_write_binary(&rsa->Q, kdata + key_size / 2, key_size / 2);
}
else if (type & PICO_KEYS_KEY_EC) {
mbedtls_ecdsa_context *ecdsa = (mbedtls_ecdsa_context *) key_ctx;
size_t olen = 0;
kdata[0] = ecdsa->grp.id & 0xff;
mbedtls_ecp_write_key_ext(ecdsa, &olen, kdata + 1, sizeof(kdata) - 1);
key_size = olen + 1;
}
else if (type & PICO_KEYS_KEY_AES) {
if (type == PICO_KEYS_KEY_AES_128) {
key_size = 16;
}
else if (type == PICO_KEYS_KEY_AES_192) {
key_size = 24;
}
else if (type == PICO_KEYS_KEY_AES_256) {
key_size = 32;
}
else if (type == PICO_KEYS_KEY_AES_512) {
key_size = 64;
}
memcpy(kdata, key_ctx, key_size);
}
else {
return PICOKEY_WRONG_DATA;
}
file_t *fpk = file_new((KEY_PREFIX << 8) | key_id);
if (!fpk) {
return PICOKEY_ERR_MEMORY_FATAL;
}
r = mkek_encrypt(kdata, key_size);
if (r != PICOKEY_OK) {
return r;
}
r = file_put_data(fpk, kdata, (uint16_t)key_size);
if (r != PICOKEY_OK) {
return r;
}
char key_id_str[4] = {0};
sprintf(key_id_str, "%u", key_id);
if (type & PICO_KEYS_KEY_EC) {
key_size--;
}
uint16_t prkd_len = asn1_build_prkd_generic(NULL, 0, (uint8_t *)key_id_str, (uint16_t)strlen(key_id_str), key_size * 8, type, kdata, sizeof(kdata));
if (prkd_len > 0) {
fpk = file_new((PRKD_PREFIX << 8) | key_id);
r = file_put_data(fpk, kdata, prkd_len);
if (r != 0) {
return SW_EXEC_ERROR();
}
}
low_flash_available();
return PICOKEY_OK;
}
int find_and_store_meta_key(uint8_t key_id) {
uint16_t meta_size = 0;
uint8_t t90[4] = { 0xFF, 0xFF, 0xFF, 0xFE };
asn1_ctx_t ctxi, ctxo[4] = { 0 };
asn1_ctx_init(apdu.data, (uint16_t)apdu.nc, &ctxi);
for (uint16_t t = 0; t < 4; t++) {
if (asn1_find_tag(&ctxi, 0x90 + t, &ctxo[t]) && asn1_len(&ctxo[t]) > 0) {
meta_size += asn1_len_tag(0x90 + t, ctxo[t].len);
}
}
if (asn1_len(&ctxo[0]) == 0) {
uint16_t opts = get_device_options();
if (opts & HSM_OPT_KEY_COUNTER_ALL) {
ctxo[0].len = 4;
ctxo[0].data = t90;
meta_size += 6;
}
}
if (meta_size) {
uint8_t *meta = (uint8_t *) calloc(1, meta_size), *m = meta;
for (uint8_t t = 0; t < 4; t++) {
if (asn1_len(&ctxo[t]) > 0) {
*m++ = 0x90 + t;
m += format_tlv_len(ctxo[t].len, m);
memcpy(m, ctxo[t].data, ctxo[t].len);
m += ctxo[t].len;
}
}
int r = meta_add((KEY_PREFIX << 8) | key_id, meta, (uint16_t)meta_size);
free(meta);
if (r != 0) {
return PICOKEY_EXEC_ERROR;
}
}
return PICOKEY_OK;
}
int load_private_key_rsa(mbedtls_rsa_context *ctx, file_t *fkey) {
if (wait_button_pressed() == true) { // timeout
return PICOKEY_VERIFICATION_FAILED;
}
uint16_t key_size = file_get_size(fkey);
uint8_t kdata[4096 / 8];
memcpy(kdata, file_get_data(fkey), key_size);
if (mkek_decrypt(kdata, key_size) != 0) {
return PICOKEY_EXEC_ERROR;
}
if (mbedtls_mpi_read_binary(&ctx->P, kdata, key_size / 2) != 0) {
mbedtls_platform_zeroize(kdata, sizeof(kdata));
mbedtls_rsa_free(ctx);
return PICOKEY_WRONG_DATA;
}
if (mbedtls_mpi_read_binary(&ctx->Q, kdata + key_size / 2, key_size / 2) != 0) {
mbedtls_platform_zeroize(kdata, sizeof(kdata));
mbedtls_rsa_free(ctx);
return PICOKEY_WRONG_DATA;
}
if (mbedtls_mpi_lset(&ctx->E, 0x10001) != 0) {
mbedtls_platform_zeroize(kdata, sizeof(kdata));
mbedtls_rsa_free(ctx);
return PICOKEY_EXEC_ERROR;
}
if (mbedtls_rsa_import(ctx, NULL, &ctx->P, &ctx->Q, NULL, &ctx->E) != 0) {
mbedtls_platform_zeroize(kdata, sizeof(kdata));
mbedtls_rsa_free(ctx);
return PICOKEY_WRONG_DATA;
}
if (mbedtls_rsa_complete(ctx) != 0) {
mbedtls_platform_zeroize(kdata, sizeof(kdata));
mbedtls_rsa_free(ctx);
return PICOKEY_WRONG_DATA;
}
if (mbedtls_rsa_check_privkey(ctx) != 0) {
mbedtls_platform_zeroize(kdata, sizeof(kdata));
mbedtls_rsa_free(ctx);
return PICOKEY_WRONG_DATA;
}
return PICOKEY_OK;
}
int load_private_key_ec(mbedtls_ecp_keypair *ctx, file_t *fkey) {
if (wait_button_pressed() == true) { // timeout
return PICOKEY_VERIFICATION_FAILED;
}
uint16_t key_size = file_get_size(fkey);
uint8_t kdata[67]; // Worst case, 521 bit + 1byte
memcpy(kdata, file_get_data(fkey), key_size);
if (mkek_decrypt(kdata, key_size) != 0) {
return PICOKEY_EXEC_ERROR;
}
mbedtls_ecp_group_id gid = kdata[0];
int r = mbedtls_ecp_read_key(gid, ctx, kdata + 1, key_size - 1);
if (r != 0) {
mbedtls_platform_zeroize(kdata, sizeof(kdata));
mbedtls_ecp_keypair_free(ctx);
return PICOKEY_EXEC_ERROR;
}
mbedtls_platform_zeroize(kdata, sizeof(kdata));
#ifdef MBEDTLS_EDDSA_C
if (gid == MBEDTLS_ECP_DP_ED25519 || gid == MBEDTLS_ECP_DP_ED448) {
r = mbedtls_ecp_point_edwards(&ctx->grp, &ctx->Q, &ctx->d, random_gen, NULL);
}
else
#endif
{
r = mbedtls_ecp_mul(&ctx->grp, &ctx->Q, &ctx->d, &ctx->grp.G, random_gen, NULL);
}
if (r != 0) {
mbedtls_ecp_keypair_free(ctx);
return PICOKEY_EXEC_ERROR;
}
return PICOKEY_OK;
}
int load_private_key_ecdh(mbedtls_ecp_keypair *ctx, file_t *fkey) {
return load_private_key_ec(ctx, fkey);
}
#define INS_VERIFY 0x20
#define INS_MSE 0x22
#define INS_CHANGE_PIN 0x24
#define INS_PSO 0x2A
#define INS_RESET_RETRY 0x2C
#define INS_KEYPAIR_GEN 0x46
#define INS_KEY_GEN 0x48
#define INS_BIP_SLIP 0x4A
#define INS_INITIALIZE 0x50
#define INS_KEY_DOMAIN 0x52
#define INS_PUK_AUTH 0x54
#define INS_LIST_KEYS 0x58
#define INS_SESSION_PIN 0x5A
#define INS_DECRYPT_ASYM 0x62
#define INS_EXTRAS 0x64
#define INS_SIGNATURE 0x68
#define INS_WRAP 0x72
#define INS_UNWRAP 0x74
#define INS_DERIVE_ASYM 0x76
#define INS_CIPHER_SYM 0x78
#define INS_EXTERNAL_AUTHENTICATE 0x82
#define INS_CHALLENGE 0x84
#define INS_GENERAL_AUTHENTICATE 0x86
#define INS_SELECT_FILE 0xA4
#define INS_READ_BINARY 0xB0
#define INS_READ_BINARY_ODD 0xB1
#define INS_UPDATE_EF 0xD7
#define INS_DELETE_FILE 0xE4
static const cmd_t cmds[] = {
{ INS_SELECT_FILE, cmd_select },
{ INS_LIST_KEYS, cmd_list_keys },
{ INS_READ_BINARY, cmd_read_binary },
{ INS_READ_BINARY_ODD, cmd_read_binary },
{ INS_VERIFY, cmd_verify },
{ INS_RESET_RETRY, cmd_reset_retry },
{ INS_CHALLENGE, cmd_challenge },
{ INS_INITIALIZE, cmd_initialize },
{ INS_KEY_DOMAIN, cmd_key_domain },
{ INS_KEYPAIR_GEN, cmd_keypair_gen },
{ INS_UPDATE_EF, cmd_update_ef },
{ INS_DELETE_FILE, cmd_delete_file },
{ INS_CHANGE_PIN, cmd_change_pin },
{ INS_KEY_GEN, cmd_key_gen },
{ INS_SIGNATURE, cmd_signature },
{ INS_WRAP, cmd_key_wrap },
{ INS_UNWRAP, cmd_key_unwrap },
{ INS_DECRYPT_ASYM, cmd_decrypt_asym },
{ INS_CIPHER_SYM, cmd_cipher_sym },
{ INS_DERIVE_ASYM, cmd_derive_asym },
{ INS_EXTRAS, cmd_extras },
{ INS_MSE, cmd_mse },
{ INS_GENERAL_AUTHENTICATE, cmd_general_authenticate },
{ INS_SESSION_PIN, cmd_session_pin },
{ INS_PUK_AUTH, cmd_puk_auth },
{ INS_PSO, cmd_pso },
{ INS_EXTERNAL_AUTHENTICATE, cmd_external_authenticate },
{ INS_BIP_SLIP, cmd_bip_slip },
{ 0x00, 0x0 }
};
int sc_hsm_process_apdu() {
uint32_t ne = apdu.ne;
int r = sm_unwrap();
if (r != PICOKEY_OK) {
return SW_DATA_INVALID();
}
for (const cmd_t *cmd = cmds; cmd->ins != 0x00; cmd++) {
if (cmd->ins == INS(apdu)) {
int res = cmd->cmd_handler();
sm_wrap();
if ((CLA(apdu) >> 2) & 0x3) {
apdu.ne = ne;
}
return res;
}
}
return SW_INS_NOT_SUPPORTED();
}
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